William A. Kennington III | c920bdb | 2019-04-19 14:23:06 -0700 | [diff] [blame] | 1 | #include "netlink.hpp" |
| 2 | #include "util.hpp" |
| 3 | |
| 4 | #include <linux/netlink.h> |
| 5 | #include <linux/rtnetlink.h> |
| 6 | |
| 7 | #include <cstring> |
| 8 | #include <stdexcept> |
| 9 | #include <string_view> |
| 10 | |
| 11 | #include <gtest/gtest.h> |
| 12 | |
| 13 | namespace phosphor |
| 14 | { |
| 15 | namespace network |
| 16 | { |
| 17 | namespace netlink |
| 18 | { |
| 19 | namespace detail |
| 20 | { |
| 21 | |
| 22 | TEST(ExtractMsgs, TooSmall) |
| 23 | { |
| 24 | const char buf[] = {'1'}; |
| 25 | static_assert(sizeof(buf) < sizeof(nlmsghdr)); |
| 26 | std::string_view data(buf, sizeof(buf)); |
| 27 | |
| 28 | size_t cbCalls = 0; |
| 29 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 30 | bool done = true; |
| 31 | EXPECT_THROW(processMsg(data, done, cb), std::runtime_error); |
| 32 | EXPECT_EQ(1, data.size()); |
| 33 | EXPECT_EQ(0, cbCalls); |
| 34 | EXPECT_TRUE(done); |
| 35 | } |
| 36 | |
| 37 | TEST(ExtractMsgs, SmallAttrLen) |
| 38 | { |
| 39 | nlmsghdr hdr{}; |
| 40 | hdr.nlmsg_len = NLMSG_LENGTH(0) - 1; |
| 41 | std::string_view data(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 42 | |
| 43 | size_t cbCalls = 0; |
| 44 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 45 | bool done = true; |
| 46 | EXPECT_THROW(processMsg(data, done, cb), std::runtime_error); |
| 47 | EXPECT_EQ(NLMSG_SPACE(0), data.size()); |
| 48 | EXPECT_EQ(0, cbCalls); |
| 49 | EXPECT_TRUE(done); |
| 50 | } |
| 51 | |
| 52 | TEST(ExtractMsgs, LargeAttrLen) |
| 53 | { |
| 54 | nlmsghdr hdr{}; |
| 55 | hdr.nlmsg_len = NLMSG_LENGTH(0) + 1; |
| 56 | std::string_view data(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 57 | |
| 58 | size_t cbCalls = 0; |
| 59 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 60 | bool done = true; |
| 61 | EXPECT_THROW(processMsg(data, done, cb), std::runtime_error); |
| 62 | EXPECT_EQ(NLMSG_SPACE(0), data.size()); |
| 63 | EXPECT_EQ(0, cbCalls); |
| 64 | EXPECT_TRUE(done); |
| 65 | } |
| 66 | |
| 67 | TEST(ExtractMsgs, NoopMsg) |
| 68 | { |
| 69 | nlmsghdr hdr{}; |
| 70 | hdr.nlmsg_len = NLMSG_LENGTH(0); |
| 71 | hdr.nlmsg_type = NLMSG_NOOP; |
| 72 | std::string_view data(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 73 | |
| 74 | size_t cbCalls = 0; |
| 75 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 76 | bool done = true; |
| 77 | processMsg(data, done, cb); |
| 78 | EXPECT_EQ(0, data.size()); |
| 79 | EXPECT_EQ(0, cbCalls); |
| 80 | EXPECT_TRUE(done); |
| 81 | } |
| 82 | |
| 83 | TEST(ExtractMsgs, AckMsg) |
| 84 | { |
| 85 | nlmsgerr ack{}; |
| 86 | nlmsghdr hdr{}; |
| 87 | hdr.nlmsg_len = NLMSG_LENGTH(sizeof(ack)); |
| 88 | hdr.nlmsg_type = NLMSG_ERROR; |
| 89 | char buf[NLMSG_ALIGN(hdr.nlmsg_len)]; |
| 90 | std::memcpy(buf, &hdr, sizeof(hdr)); |
| 91 | std::memcpy(NLMSG_DATA(buf), &ack, sizeof(ack)); |
| 92 | std::string_view data(reinterpret_cast<char*>(&buf), sizeof(buf)); |
| 93 | |
| 94 | size_t cbCalls = 0; |
| 95 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 96 | bool done = true; |
| 97 | processMsg(data, done, cb); |
| 98 | EXPECT_EQ(0, data.size()); |
| 99 | EXPECT_EQ(0, cbCalls); |
| 100 | EXPECT_TRUE(done); |
| 101 | } |
| 102 | |
| 103 | TEST(ExtractMsgs, ErrMsg) |
| 104 | { |
| 105 | nlmsgerr err{}; |
| 106 | err.error = EINVAL; |
| 107 | nlmsghdr hdr{}; |
| 108 | hdr.nlmsg_len = NLMSG_LENGTH(sizeof(err)); |
| 109 | hdr.nlmsg_type = NLMSG_ERROR; |
| 110 | char buf[NLMSG_ALIGN(hdr.nlmsg_len)]; |
| 111 | std::memcpy(buf, &hdr, sizeof(hdr)); |
| 112 | std::memcpy(NLMSG_DATA(buf), &err, sizeof(err)); |
| 113 | std::string_view data(reinterpret_cast<char*>(&buf), sizeof(buf)); |
| 114 | |
| 115 | size_t cbCalls = 0; |
| 116 | nlmsghdr hdrOut; |
| 117 | std::string_view dataOut; |
| 118 | auto cb = [&](const nlmsghdr& hdr, std::string_view data) { |
| 119 | hdrOut = hdr; |
| 120 | dataOut = data; |
| 121 | cbCalls++; |
| 122 | }; |
| 123 | bool done = true; |
| 124 | processMsg(data, done, cb); |
| 125 | EXPECT_EQ(0, data.size()); |
| 126 | EXPECT_EQ(1, cbCalls); |
| 127 | EXPECT_TRUE(equal(hdr, hdrOut)); |
| 128 | EXPECT_TRUE(equal(err, extract<nlmsgerr>(dataOut))); |
| 129 | EXPECT_EQ(0, dataOut.size()); |
| 130 | EXPECT_TRUE(done); |
| 131 | } |
| 132 | |
| 133 | TEST(ExtractMsgs, DoneNoMulti) |
| 134 | { |
| 135 | nlmsghdr hdr{}; |
| 136 | hdr.nlmsg_len = NLMSG_LENGTH(0); |
| 137 | hdr.nlmsg_type = NLMSG_DONE; |
| 138 | std::string_view data(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 139 | |
| 140 | size_t cbCalls = 0; |
| 141 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 142 | bool done = true; |
| 143 | EXPECT_THROW(processMsg(data, done, cb), std::runtime_error); |
| 144 | EXPECT_EQ(0, data.size()); |
| 145 | EXPECT_EQ(0, cbCalls); |
| 146 | EXPECT_TRUE(done); |
| 147 | } |
| 148 | |
| 149 | TEST(ExtractMsg, TwoMultiMsgs) |
| 150 | { |
| 151 | nlmsghdr hdr{}; |
| 152 | hdr.nlmsg_len = NLMSG_LENGTH(0); |
| 153 | hdr.nlmsg_type = RTM_NEWLINK; |
| 154 | hdr.nlmsg_flags = NLM_F_MULTI; |
| 155 | std::string buf; |
| 156 | buf.append(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 157 | buf.append(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 158 | |
| 159 | std::string_view data = buf; |
| 160 | size_t cbCalls = 0; |
| 161 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 162 | bool done = true; |
| 163 | processMsg(data, done, cb); |
| 164 | EXPECT_EQ(NLMSG_SPACE(0), data.size()); |
| 165 | EXPECT_EQ(1, cbCalls); |
| 166 | EXPECT_FALSE(done); |
| 167 | |
| 168 | processMsg(data, done, cb); |
| 169 | EXPECT_EQ(0, data.size()); |
| 170 | EXPECT_EQ(2, cbCalls); |
| 171 | EXPECT_FALSE(done); |
| 172 | } |
| 173 | |
| 174 | TEST(ExtractMsgs, MultiMsgValid) |
| 175 | { |
| 176 | nlmsghdr hdr{}; |
| 177 | hdr.nlmsg_len = NLMSG_LENGTH(0); |
| 178 | hdr.nlmsg_type = RTM_NEWLINK; |
| 179 | hdr.nlmsg_flags = NLM_F_MULTI; |
| 180 | std::string_view data(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 181 | |
| 182 | size_t cbCalls = 0; |
| 183 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 184 | bool done = true; |
| 185 | processMsg(data, done, cb); |
| 186 | EXPECT_EQ(0, data.size()); |
| 187 | EXPECT_EQ(1, cbCalls); |
| 188 | EXPECT_FALSE(done); |
| 189 | |
| 190 | hdr.nlmsg_type = NLMSG_DONE; |
| 191 | hdr.nlmsg_flags = 0; |
| 192 | data = std::string_view(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 193 | processMsg(data, done, cb); |
| 194 | EXPECT_EQ(0, data.size()); |
| 195 | EXPECT_EQ(1, cbCalls); |
| 196 | EXPECT_TRUE(done); |
| 197 | } |
| 198 | |
| 199 | TEST(ExtractMsgs, MultiMsgInvalid) |
| 200 | { |
| 201 | nlmsghdr hdr{}; |
| 202 | hdr.nlmsg_len = NLMSG_LENGTH(0); |
| 203 | hdr.nlmsg_type = RTM_NEWLINK; |
| 204 | hdr.nlmsg_flags = NLM_F_MULTI; |
| 205 | std::string_view data(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 206 | |
| 207 | size_t cbCalls = 0; |
| 208 | auto cb = [&](const nlmsghdr&, std::string_view) { cbCalls++; }; |
| 209 | bool done = true; |
| 210 | processMsg(data, done, cb); |
| 211 | EXPECT_EQ(0, data.size()); |
| 212 | EXPECT_EQ(1, cbCalls); |
| 213 | EXPECT_FALSE(done); |
| 214 | |
| 215 | hdr.nlmsg_flags = 0; |
| 216 | data = std::string_view(reinterpret_cast<char*>(&hdr), NLMSG_SPACE(0)); |
| 217 | EXPECT_THROW(processMsg(data, done, cb), std::runtime_error); |
| 218 | EXPECT_EQ(0, data.size()); |
| 219 | EXPECT_EQ(1, cbCalls); |
| 220 | EXPECT_FALSE(done); |
| 221 | } |
| 222 | |
| 223 | } // namespace detail |
| 224 | |
| 225 | TEST(ExtractRtAttr, TooSmall) |
| 226 | { |
| 227 | const char buf[] = {'1'}; |
| 228 | static_assert(sizeof(buf) < sizeof(rtattr)); |
| 229 | std::string_view data(buf, sizeof(buf)); |
| 230 | |
| 231 | EXPECT_THROW(extractRtAttr(data), std::runtime_error); |
| 232 | EXPECT_EQ(1, data.size()); |
| 233 | } |
| 234 | |
| 235 | TEST(ExtractRtAttr, SmallAttrLen) |
| 236 | { |
| 237 | rtattr rta{}; |
| 238 | rta.rta_len = RTA_LENGTH(0) - 1; |
| 239 | std::string_view data(reinterpret_cast<char*>(&rta), RTA_SPACE(0)); |
| 240 | |
| 241 | EXPECT_THROW(extractRtAttr(data), std::runtime_error); |
| 242 | EXPECT_EQ(RTA_SPACE(0), data.size()); |
| 243 | } |
| 244 | |
| 245 | TEST(ExtractRtAttr, LargeAttrLen) |
| 246 | { |
| 247 | rtattr rta{}; |
| 248 | rta.rta_len = RTA_LENGTH(0) + 1; |
| 249 | std::string_view data(reinterpret_cast<char*>(&rta), RTA_SPACE(0)); |
| 250 | |
| 251 | EXPECT_THROW(extractRtAttr(data), std::runtime_error); |
| 252 | EXPECT_EQ(RTA_SPACE(0), data.size()); |
| 253 | } |
| 254 | |
| 255 | TEST(ExtractRtAttr, NoData) |
| 256 | { |
| 257 | rtattr rta{}; |
| 258 | rta.rta_len = RTA_LENGTH(0); |
| 259 | std::string_view data(reinterpret_cast<char*>(&rta), RTA_SPACE(0)); |
| 260 | |
| 261 | auto [hdr, attr] = extractRtAttr(data); |
| 262 | EXPECT_EQ(0, data.size()); |
| 263 | EXPECT_EQ(0, attr.size()); |
| 264 | EXPECT_EQ(0, std::memcmp(&rta, &hdr, sizeof(rta))); |
| 265 | } |
| 266 | |
| 267 | TEST(ExtractRtAttr, SomeData) |
| 268 | { |
| 269 | const char attrbuf[] = "abcd"; |
| 270 | const char nextbuf[] = "efgh"; |
| 271 | rtattr rta{}; |
| 272 | rta.rta_len = RTA_LENGTH(sizeof(attrbuf)); |
| 273 | |
| 274 | char buf[RTA_SPACE(sizeof(attrbuf)) + sizeof(nextbuf)]; |
| 275 | memcpy(buf, &rta, sizeof(rta)); |
| 276 | memcpy(RTA_DATA(buf), &attrbuf, sizeof(attrbuf)); |
| 277 | memcpy(buf + RTA_SPACE(sizeof(attrbuf)), &nextbuf, sizeof(nextbuf)); |
| 278 | std::string_view data(buf, sizeof(buf)); |
| 279 | |
| 280 | auto [hdr, attr] = extractRtAttr(data); |
| 281 | EXPECT_EQ(0, memcmp(&rta, &hdr, sizeof(rta))); |
| 282 | EXPECT_EQ(sizeof(attrbuf), attr.size()); |
| 283 | EXPECT_EQ(0, memcmp(&attrbuf, attr.data(), sizeof(attrbuf))); |
| 284 | EXPECT_EQ(sizeof(nextbuf), data.size()); |
| 285 | EXPECT_EQ(0, memcmp(&nextbuf, data.data(), sizeof(nextbuf))); |
| 286 | } |
| 287 | |
| 288 | } // namespace netlink |
| 289 | } // namespace network |
| 290 | } // namespace phosphor |